Recent content by jr-c1

  1. J

    Calculating a Ballistic Coefficient (BC) from two velocities

    I see my first problem was thinking the 0.0052834 constant had to be converted to use either the ICAO or Metro standard atmosphere used by the manufacturers, which led me to use Air Density and Air Resistance constants interchangeably. Thanks for straightening this out for me. After going back...
  2. J

    How Can Doppler Radar Improve Drag Coefficient Measurements in Physics Labs?

    I’ve read your paper with great interest. I have a similar interest in calculating BCs from Doppler Radar, but I’m have difficulties getting the calculation correct. I know I could use online calculators, I’d rather do the math myself. Could you share what formula you used?
  3. J

    Calculating a Ballistic Coefficient (BC) from two velocities

    I have been attempting to calculate a Ballistic Coefficient (BC) from two velocities of a known distance using the formula: BC = (AirDensity * Distance) / ( SQRT(Velocity0) - SQRT(Velocity1)) for example AirDensity = 0.0751265 lb/ft³ Distance = 100 yards Velocity0 = 3000 fps Velocity1 = 2772...
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